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Updated: Aug 11, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
511 keV photons from superconducting cosmic strings
Francesc Ferrer1, Tanmay Vachaspati
1CERCA, Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106-7079, USA.
Abstract:
We show that a tangle of light superconducting strings in the Milky Way could be the source of the observed 511 keV emission from electron-positron annihilation in the Galactic bulge. The scenario predicts a flux that is in agreement with observations if the strings are at the approximately 1 TeV scale, making the particle physics within reach of planned accelerator experiments. The emission is directly proportional to the galactic magnetic field, and future observations should be able to differentiate the superconducting string scenario from other proposals.
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